1. QRLOCK is a new kind of lock system which can use phone App to get key, manage key, share key online. 
2. Have own phone APP and QRcode recognition technology.
3. Special unique QRcode encoding and decoding system can avoid intended copy and information leakage.
4. Integrate offline door lock with online key. Get rid of complex internet wires, wifi machines and unstable network.
5. Scanning QRcode is very frequently operation during people's daily life.

Characteristics
1. A lock can be opened by phone app.
2. A lock can manage its key online.
3. A lock can set key limitation anytime and anywhere.
4. A lock can be remote managed.
5. A lock which is off-line, no need any network, but its key is online and changeable.
6. A lock, its keys can be shared via SMS and email.